package io.renren.modules.hotel.wx;

import org.apache.commons.lang3.StringUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import io.renren.modules.hotel.config.WxMpConfiguration;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import me.chanjar.weixin.mp.api.WxMpService;
import me.chanjar.weixin.mp.bean.message.WxMpXmlMessage;
import me.chanjar.weixin.mp.bean.message.WxMpXmlOutMessage;

/**
 * @program: hotel-saas
 * @description:公众号消息配置
 * @author: taoz
 * @create: 2019-08-17 16:54
 **/

@Slf4j
@Api(value = "微信公众号消息服务器配置", tags = {"微信公众号消息服务器配置"})
@RestController
@RequestMapping("/wx/portal/{appid}")
public class WxPortalController {
    @ApiOperation("服务器认证")
    @GetMapping(produces = "text/plain;charset=utf-8")
    public String authGet(@PathVariable String appid, @RequestParam(name = "signature", required = false) String signature, @RequestParam(name = "timestamp", required = false) String timestamp, @RequestParam(name = "nonce", required = false) String nonce, @RequestParam(name = "echostr", required = false) String echostr) {
        log.info("\n接收到来自微信服务器的认证消息：[{}, {}, {}, {}]", signature, timestamp, nonce, echostr);
        if (StringUtils.isAnyBlank(signature, timestamp, nonce, echostr)) {
            throw new IllegalArgumentException("请求参数非法，请核实!");
        }

        final WxMpService wxService = WxMpConfiguration.getMpServices().get(appid);
        if (wxService == null) {
            throw new IllegalArgumentException(String.format("未找到对应appid=[%d]的配置，请核实！", appid));
        }

        if (wxService.checkSignature(timestamp, nonce, signature)) {
            return echostr;
        }

        return "非法请求";
    }

    @ApiOperation("微信消息")
    @PostMapping(produces = "application/xml; charset=UTF-8")
    public String post(@PathVariable String appid, @RequestBody String requestBody, @RequestParam("signature") String signature, @RequestParam("timestamp") String timestamp, @RequestParam("nonce") String nonce, @RequestParam("openid") String openid, @RequestParam(name = "encrypt_type", required = false) String encType, @RequestParam(name = "msg_signature", required = false) String msgSignature) {
        final WxMpService wxService = WxMpConfiguration.getMpServices().get(appid);
        log.info("\n接收微信请求：[openid=[{}], [signature=[{}], encType=[{}], msgSignature=[{}]," + " timestamp=[{}], nonce=[{}], requestBody=[\n{}\n] ", openid, signature, encType, msgSignature, timestamp, nonce, requestBody);

        if (!wxService.checkSignature(timestamp, nonce, signature)) {
            throw new IllegalArgumentException("非法请求，可能属于伪造的请求！");
        }
        String out = null;
        if (encType == null) {
            // 明文传输的消息
            WxMpXmlMessage inMessage = WxMpXmlMessage.fromXml(requestBody);
            WxMpXmlOutMessage outMessage = this.route(inMessage, appid);
            if (outMessage == null) {
                return "";
            }

            out = outMessage.toXml();
        } else if ("aes".equalsIgnoreCase(encType)) {
            // aes加密的消息
            WxMpXmlMessage inMessage = WxMpXmlMessage.fromEncryptedXml(requestBody, wxService.getWxMpConfigStorage(), timestamp, nonce, msgSignature);
            log.debug("\n消息解密后内容为：\n{} ", inMessage.toString());
            WxMpXmlOutMessage outMessage = this.route(inMessage, appid);
            if (outMessage == null) {
                return "";
            }

            out = outMessage.toEncryptedXml(wxService.getWxMpConfigStorage());
        }

        log.debug("\n组装回复信息：{}", out);
        return out;
    }

    private WxMpXmlOutMessage route(WxMpXmlMessage message, String appid) {
        try {
            return WxMpConfiguration.getRouters().get(appid).route(message);
        } catch (Exception e) {
            log.error("路由消息时出现异常！", e);
        }

        return null;
    }
}
